Operating systems

LibSylph is a cross-platform C++ library for basic utility and data processing. It has classes and methods that facilitate reading, writing, processing, and sharing data in various kinds of formats. It includes frameworks for IPC and RPC, socket programming, plugin systems, etc.

STALLioN is a cross-platform C/C++ library for creating coherent CLI/Terminal programs on multiple platforms with one codebase. It aims to provide a consistent development API across multiple platforms so that
separate code does not have to be created for each (often very different) terminal interface.

liblacewing is a cross-platform, high-level networking library. It aims to provide a set of straightforward classes for socket communication in C/C++, with a focus on scalability and platform specific optimisations (eg. support for IOCP, epoll, and kqueue).